summaryrefslogtreecommitdiffstats
path: root/libblkid/src/superblocks/zonefs.c
diff options
context:
space:
mode:
Diffstat (limited to 'libblkid/src/superblocks/zonefs.c')
-rw-r--r--libblkid/src/superblocks/zonefs.c87
1 files changed, 87 insertions, 0 deletions
diff --git a/libblkid/src/superblocks/zonefs.c b/libblkid/src/superblocks/zonefs.c
new file mode 100644
index 0000000..4c826ec
--- /dev/null
+++ b/libblkid/src/superblocks/zonefs.c
@@ -0,0 +1,87 @@
+/*
+ * Copyright (C) 2020 Western Digital Corporation or its affiliates.
+ *
+ * This file may be redistributed under the terms of the
+ * GNU Lesser General Public License
+ */
+#include <stddef.h>
+#include <string.h>
+
+#include "superblocks.h"
+
+#define ZONEFS_MAGIC "SFOZ" /* 0x5a4f4653 'Z' 'O' 'F' 'S' */
+#define ZONEFS_MAGIC_SIZE 4
+#define ZONEFS_MAGIC_OFST 0
+#define ZONEFS_UUID_SIZE 16
+#define ZONEFS_LABEL_SIZE 32
+#define ZONEFS_SB_OFST 0
+
+#define ZONEFS_BLOCK_SIZE 4096U
+
+/* All in little-endian */
+struct zonefs_super {
+
+ /* Magic number */
+ int32_t s_magic;
+
+ /* Checksum */
+ int32_t s_crc;
+
+ /* Volume label */
+ char s_label[ZONEFS_LABEL_SIZE];
+
+ /* 128-bit uuid */
+ uint8_t s_uuid[ZONEFS_UUID_SIZE];
+
+ /* Features */
+ int64_t s_features;
+
+ /* UID/GID to use for files */
+ int32_t s_uid;
+ int32_t s_gid;
+
+ /* File permissions */
+ int32_t s_perm;
+
+ /* Padding to 4096 bytes */
+ /* uint8_t s_reserved[4020]; */
+
+} __attribute__ ((packed));
+
+static int probe_zonefs(blkid_probe pr,
+ const struct blkid_idmag *mag __attribute__((__unused__)))
+{
+ struct zonefs_super *sb;
+
+ sb = (struct zonefs_super *)
+ blkid_probe_get_buffer(pr, ZONEFS_SB_OFST,
+ sizeof(struct zonefs_super));
+ if (!sb)
+ return errno ? -errno : 1;
+
+ if (sb->s_label[0])
+ blkid_probe_set_label(pr, (unsigned char *) sb->s_label,
+ sizeof(sb->s_label));
+
+ blkid_probe_set_uuid(pr, sb->s_uuid);
+ blkid_probe_set_block_size(pr, ZONEFS_BLOCK_SIZE);
+
+ return 0;
+}
+
+const struct blkid_idinfo zonefs_idinfo =
+{
+ .name = "zonefs",
+ .usage = BLKID_USAGE_FILESYSTEM,
+ .probefunc = probe_zonefs,
+ .magics =
+ {
+ {
+ .magic = (char *)ZONEFS_MAGIC,
+ .len = ZONEFS_MAGIC_SIZE,
+ .kboff = ZONEFS_SB_OFST,
+ .sboff = ZONEFS_MAGIC_OFST,
+ },
+ { NULL }
+ }
+};